An anonymous reader writes: About a week ago, the Federal Communications Commission (FCC) asked for Verizon's justification on its policy of throttling users who pay for unlimited data usage. "I know of no past Commission statement that would treat 'as reasonable network management' a decision to slow traffic to a user who has paid, after all, for 'unlimited' service," the FCC wrote. In its response, Verizon has indicated that its throttling policy is meant to provide users with an incentive to limit their data usage. The company explained that "a small percentage of the customers on these [unlimited] plans use disproportionately large amounts of data, and, unlike subscribers on usage-based plans, they have no incentive not to do so during times of unusually high demand....our practice is a measured and fair step to ensure that this small group of customers do not disadvantage all others."